The Cloud storage tiering was implemented with tiered storage file system filter driver. A file system filter driver intercepts requests targeted at a file system or another file system filter driver. By intercepting the request before it reaches its intended target, the filter driver can extend or replace functionality provided by the original target of the request. File system filtering services are available through the filter manager in Windows. The EaseTag tiered storage filter driver can intercept the file I/O to the local storage and redirect it to the remote cloud storage by implementing the file system filtering functionalities which was provided by the Filter Manager framework.
Hierarchical storage management
EaseTag Cloud Storage Connect is a data storage technique which automatically moves data between high-cost local disk and low-cost remote cloud storage. EaseTag Cloud Storage Connect can help simplify the migration process by providing the transparent file access from the remote storage. Using the cloud as a storage tier, data can first be moved to a ‘warm’ archive tier of higher-performance disk, where it can still be accessed quickly to meet RPO and RTO SLA’s. As you retain archives for longer, older data can then be moved to a ‘cold’ archive tier with better economics. (This is similar to the tiered storage cost/performance model offered by Amazon S3 with its “warm” Standard tier, “cold” Infrequent Access tier and “frozen” Glacier tier.)
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